Kindly explain me this solution in detail

I have attached the three questions. I will be highly greatful if anyone of you explain me these solutions in Detail. Thaks a lot

Attachment 12939

Attachment 12940

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- Sep 17th 2009, 05:02 AMmoonnightingalekindly explain me solution of integration
Kindly explain me this solution in detail

I have attached the three questions. I will be highly greatful if anyone of you explain me these solutions in Detail. Thaks a lot

Attachment 12939

Attachment 12940 - Sep 17th 2009, 06:29 AMCaptainBlack
- Sep 17th 2009, 06:32 AMCaptainBlack